From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 87C56C433E2 for ; Mon, 7 Sep 2020 16:38:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 432EE21D80 for ; Mon, 7 Sep 2020 16:38:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1599496681; bh=BKVFiFzMUYAQUVaxQkM6bp25DCi8Pz65MYI1WSJoPFc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ndT+zLHj60MfV9/cxQ+p3yUvbjnF94zxFyGMBOE6HMDa+eSYsDfVIYO9ydjupmH+b 4x04yVX7eypaIY6Q6FJhwu7H4vSyWsn4NVjo4i3g5Qzl4NmOh7Wwun3kRS4XHWBDHJ A3N1ghEqUnHKRYlEUxO403UxO5Depj6/qJBDZIiE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730108AbgIGQh7 (ORCPT ); Mon, 7 Sep 2020 12:37:59 -0400 Received: from mail.kernel.org ([198.145.29.99]:48006 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729853AbgIGQeY (ORCPT ); Mon, 7 Sep 2020 12:34:24 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 18FDF21927; Mon, 7 Sep 2020 16:34:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1599496463; bh=BKVFiFzMUYAQUVaxQkM6bp25DCi8Pz65MYI1WSJoPFc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sBCtr/ALn9PuW+8QBzktFboTp3Lekt/coGaRMkwrXO2/iP9rHx1rKXBztT50rj8tF ncrtlQyzRlCBDi9UA0lCbOI3ytFVBMGLGvf705p0re3bCx52qRSvXf7sxTF4TroIul xbocCfgFERYtEny+ByiMrQCn9jFw8PKfBbgyxeqk= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Joerg Roedel , Sasha Levin , iommu@lists.linux-foundation.org Subject: [PATCH AUTOSEL 5.4 42/43] iommu/amd: Do not use IOMMUv2 functionality when SME is active Date: Mon, 7 Sep 2020 12:33:28 -0400 Message-Id: <20200907163329.1280888-42-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200907163329.1280888-1-sashal@kernel.org> References: <20200907163329.1280888-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Joerg Roedel [ Upstream commit 2822e582501b65707089b097e773e6fd70774841 ] When memory encryption is active the device is likely not in a direct mapped domain. Forbid using IOMMUv2 functionality for now until finer grained checks for this have been implemented. Signed-off-by: Joerg Roedel Link: https://lore.kernel.org/r/20200824105415.21000-3-joro@8bytes.org Signed-off-by: Joerg Roedel Signed-off-by: Sasha Levin --- drivers/iommu/amd_iommu_v2.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/iommu/amd_iommu_v2.c b/drivers/iommu/amd_iommu_v2.c index d6d85debd01b0..05f3d93cf480c 100644 --- a/drivers/iommu/amd_iommu_v2.c +++ b/drivers/iommu/amd_iommu_v2.c @@ -741,6 +741,13 @@ int amd_iommu_init_device(struct pci_dev *pdev, int pasids) might_sleep(); + /* + * When memory encryption is active the device is likely not in a + * direct-mapped domain. Forbid using IOMMUv2 functionality for now. + */ + if (mem_encrypt_active()) + return -ENODEV; + if (!amd_iommu_v2_supported()) return -ENODEV; -- 2.25.1